⚡ Circuit Breaker

Surge Protector

A Surge Protection Device (SPD) is not a circuit breaker but a board component that diverts transient overvoltages (from lightning or switching) to earth, protecting connected equipment. It limits voltage spikes rather than interrupting overload or fault current.

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⚠️ Note: An SPD requires correctly rated backup overcurrent protection and proper earthing; type selection and installation must follow local regulations and manufacturer instructions. Values are typical/indicative.

Typical specification

Property	Typical value
Type	Surge Protection Device (SPD), Type 1 / 2 / 3
Protects against	Transient overvoltages / voltage surges (not overcurrent)
Current rating	Rated by discharge current: Iimp (Type 1) or In/Imax (Type 2), e.g. Imax 20-40 kA typical
Breaking capacity	Not a breaker; requires a backup overcurrent protective device (fuse/MCB)
Poles	Configured for the supply (e.g. 1P+N, 3P+N) per earthing system
Trip curve	Not applicable (voltage-limiting, with status/end-of-life indicator)
Standard	IEC/EN 61643-11

Indicative / typical values for planning — actual products vary by manufacturer and standard. Confirm the final spec sheet before ordering; we do not publish fixed prices, request a quote for current offers.

Applications

Installed in the distribution board to protect household electronics and appliances from lightning-induced and switching transients.

What to specify when you request a quote

SPD type (Type 1 for lightning current, Type 2 for board-level, Type 3 at equipment)
Voltage protection level (Up) and nominal/max discharge current (In/Imax)
Configuration suited to the earthing system (TN, TT) and number of poles
Coordinated backup overcurrent protection (fuse/MCB) as specified by the maker

Related in Circuit Breaker

MCB RCCB RCBO MCCB ← All circuit breaker

FAQ

Is a surge protector a replacement for a circuit breaker?

No. An SPD only limits transient overvoltages and must be used alongside MCBs/RCBOs, which provide overload, short-circuit, and earth-fault protection.

How do I know when an SPD needs replacing?

Most SPDs have a status window or remote indicator that changes state at end of life; a tripped or discoloured indicator means the module should be replaced.

Request a Surge Protector quote

Send your sizes and quantities (or your floor plan) — our team specs and supplies against it.

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